Process for the production of mesophase pitch
US4904371A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 13, 1988 |
| Grant date | Feb 27, 1990 |
| Priority date | — |
| Expiry date | Oct 13, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10C3/002
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An improved process for producing an anisotropic pitch product suitable for carbon fiber manufacture. A carbonaceous feedstock substantially free of mesophase pitch is heated for a period of time at an elevated temperature while passing an oxidatively reactive sparging gas such as a mixture of oxygen and nitrogen through the feedstock. The oxidatively treated feedstock is then subjected to a heat soak, for a longer period of time in the absence of a sparging gas. Thereafter the heat soaked feedstock is heated at an elevated temperature in the presence of a non-oxidative sparging gas for a time period equal to or less than the heat soak to produce an anisotropic pitch having from 50 to 100% by volume mesophase which is suitable for producing good quality carbon fibers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.